In Buffy,Cordelia gets a re-bar through her torso, in the commercial where director is checking her wardrobe there's no sign of any scarring.
When Angel is visiting Cordelia on the set for recording the commercial and Cordelia says, "You need to go now", the sound is not in sync with her mouth.
(at around 28 mins) The gray boom microphone is visible for a few seconds on the right side of the frame as it bobs up and down.